Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income	Total
Beginning balance, shares at Dec. 31, 2017	1,416,699
Beginning balance, amount at Dec. 31, 2017	$ 1,600	$ 14,780,100	$ 35,621,800	$ (3,036,800)		$ 47,366,700
Net income/(loss)			317,300			317,300
Ending balance, shares at Mar. 31, 2018	1,416,699
Ending balance, amount at Mar. 31, 2018	$ 1,600	14,780,100	35,939,100	(3,036,800)		47,684,000
Beginning balance, shares at Dec. 31, 2017	1,416,699
Beginning balance, amount at Dec. 31, 2017	$ 1,600	14,780,100	35,621,800	(3,036,800)		47,366,700
Net income/(loss)						(4,247,600)
Accumulated other comprehensive income						0
Ending balance, shares at Sep. 30, 2018	1,416,699
Ending balance, amount at Sep. 30, 2018	$ 1,600	14,780,100	31,374,300	(3,037,300)		41,287,900
Beginning balance, shares at Mar. 31, 2018	1,416,699
Beginning balance, amount at Mar. 31, 2018	$ 1,600	14,780,100	35,939,100	(3,036,800)		47,684,000
Net income/(loss)			(81,100)			(81,100)
Ending balance, shares at Jun. 30, 2018	1,416,699
Ending balance, amount at Jun. 30, 2018	$ 1,600	14,780,100	35,858,000	(3,036,800)		35,858,000
Net income/(loss)			(4,483,700)			(4,483,700)
Accumulated other comprehensive income						0
Ending balance, shares at Sep. 30, 2018	1,416,699
Ending balance, amount at Sep. 30, 2018	$ 1,600	14,780,100	31,374,300	(3,037,300)		41,287,900
Beginning balance, shares at Dec. 31, 2018	1,545,884
Beginning balance, amount at Dec. 31, 2018	$ 1,800	16,782,800	27,540,600	(3,037,300)		41,287,900
Net income/(loss)			(1,308,200)			(1,308,200)
Accumulated other comprehensive income					$ (427,800)	(427,800)
Ending balance, shares at Mar. 31, 2019	1,545,884
Ending balance, amount at Mar. 31, 2019	$ 1,800	16,782,800	26,232,400	(3,037,300)	(427,800)	39,551,900
Beginning balance, shares at Dec. 31, 2018	1,545,884
Beginning balance, amount at Dec. 31, 2018	$ 1,800	16,782,800	27,540,600	(3,037,300)		41,287,900
Net income/(loss)						(9,617,100)
Accumulated other comprehensive income						(1,554,100)
Ending balance, shares at Sep. 30, 2019	1,545,884
Ending balance, amount at Sep. 30, 2019	$ 1,800	16,782,800	17,923,400	(3,037,300)	(1,554,100)	30,116,600
Beginning balance, shares at Mar. 31, 2019	1,545,884
Beginning balance, amount at Mar. 31, 2019	$ 1,800	16,782,800	26,232,400	(3,037,300)	(427,800)	39,551,900
Net income/(loss)			(77,600)			(77,600)
Accumulated other comprehensive income					(1,011,300)	(1,011,300)
Ending balance, shares at Jun. 30, 2019	1,545,884
Ending balance, amount at Jun. 30, 2019	$ 1,800	16,782,800	26,154,800	(3,037,300)	(1,439,100)	38,463,000
Net income/(loss)			(8,231,400)			(8,231,400)
Accumulated other comprehensive income					(115,000)	(115,000)
Ending balance, shares at Sep. 30, 2019	1,545,884
Ending balance, amount at Sep. 30, 2019	$ 1,800	$ 16,782,800	$ 17,923,400	$ (3,037,300)	$ (1,554,100)	$ 30,116,600